Please Help Me!!!........​

Given :

The inertia of an object is related to its: a. Mass and speed, b. Mass and force, c. Mass only, d. Speed only.

Solution :

Inertia is the tendency of an object to continue its current state i.e. motion and rest.

Now, inertia only depends on mass of the object.

If mass of object is too huge. It is hard to to change its current state in comparison to object of small mass.

Therefore, correct object is c. Mass only.

The volume flux inside the rectangular duct is 0.028 m³/s.

Volume flux, also known as volumetric flow rate, is a measure of the volume of fluid passing through a given area per unit time. It is commonly expressed in cubic meters per second (m³/s). To calculate the volume flux in the given scenario, we can use the formula:

Volume Flux = (Air flow rate) / (Cross-sectional area)

First, we need to calculate the cross-sectional area of the rectangular duct. The area can be determined by multiplying the length and width of the duct:

Area = (138 mm) * (346 mm)

To maintain consistent units, we convert the dimensions to meters:

Area = (138 mm * 10⁻³ m/mm) * (346 mm * 10⁻³ m/mm)

Next, we can calculate the air flow rate using the given information. The air flow rate is given as 17 N/s, which represents the mass flow rate. We can convert the mass flow rate to volume flow rate using the ideal gas law:

Volume Flow Rate = (Mass Flow Rate) / (Density)

The density of air can be determined using the ideal gas law:

Density = (Pressure) / (Gas constant * Temperature)

where the gas constant (R) is given as 28.5 m/K, the pressure is 112 kPa, and the temperature is 20 degrees Celsius.

With the density calculated, we can now determine the volume flow rate. Finally, we can divide the volume flow rate by the cross-sectional area to obtain the volume flux.

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Answer:

1)SI is coherent system of units

2) SI is rational system of units

The conclusions that can be drawn about how objects can exert forces on each other even when they are not in contact is due to Earth's gravitational force as proposed by Newton.

A non contact force is a type that occurs when two objects that are not in contact exerts force on each other.

This type of force is possible because of gravitational force of Earth.

Thus, the conclusions that can be drawn about how objects can exert forces on each other even when they are not in contact is due to Earth's gravitational force as proposed by Newton.

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Answer:

The correct answer should be high amplitude : )

Explanation:

A high energy wave is characterized by a high amplitude, a low energy wave is characterized by a low amplitud

Carrying a load on one's head can indeed be considered as a form of work. Work, in physics, is defined as the transfer of energy from one object to another, resulting in the displacement of the second object in the direction of the applied force.

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Answer:

the answer to your question is true

Answer:

false

Explanation:

i took the test

If a space rover has a mass of 3900 kg on Earth, then its mass when it lands on Mars will be the same i.e. 3900 kg.

Mass is the amount of matter present in the object.

The mass of the object is always constant, anywhere it is on the Earth or Moon or any other planet.

Thus, If a space rover has a mass of 3900 kg on Earth, the mass on Mars when it lands will be 3900kg.

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Answer:

D. All bulbs will go out

Explanation:

This is a series circuit. If one bulb goes out, all the other bulbs will not light since it is now an incomplete circuit. The circuit cannot flow to the other bulbs since one bulb is out which will prevent current from flowing to the rest of the circuit.

A wave that is made up of electric and magnetic field is called an electromagnetic wave. They are produced by oscillations if both the fields.

An electromagnetic wave is produced when an electrical field come in contact with a magnetic field. An electric wave is produced by a charged particle. When a charged particle moves, magnetic waves are formed. So when a charged particle moves an electromagnetic field is formed. An electromagnetic wave is simply electrical and magnetic field moving with the speed of light.

The oscillation of electric field and magnetic field is perpendicular to the direction of the wave. Electromagnetic spectrum is the spectrum of waves arranged in order of increasing wavelength.

Examples are Gamma rays, X-rays, UV, Visible light, Infra red and radio waves.

So the wave that is made up of both electrical and magnetic fields are Electromagnetic waves.

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Answer:

Work Definition in Chemistry

Work Definition . Work is the energy required to move an object against a force. ...

Mechanical Work . Mechanical work is the type of work most commonly dealt with in physicsand chemistry. ...

PV Work . Another common type of work is pressure-volume work. ...

Sign Convention for Work . Work performed by the system on the surroundings has a negativesign. ...

Explanation:

Answer:

Explanation:

actually , the acceleration due to gravity depends on the distance from it's center of the earth.

when the distance from the earth increases , the acceleration due to gravity decreases as a result . The value of gravity in space is zero.

Answer:

It would be considered a close circuit when the circuit is off

The Carnot engine operates on an ideal gas and extracts 100 J of heat energy during the isothermal expansion at 300°C. The question asks for the amount of heat energy exhausted during the isothermal compression at 50°C.

In a Carnot engine, the efficiency is given by the formula η = 1 - (Tc/Th), where η is the efficiency, Tc is the absolute temperature of the cold reservoir, and Th is the absolute temperature of the hot reservoir.

Since the expansion and compression processes in a Carnot engine are isothermal, the temperature of the hot reservoir (Th) is 300°C + 273.15 (to convert to Kelvin), and the temperature of the cold reservoir (Tc) is 50°C + 273.15.

To find the amount of heat energy exhausted during the isothermal compression, we need to calculate the efficiency of the Carnot engine and subtract it from 1, and then multiply it by the heat energy input during the expansion process (100 J).

However, without knowing the values of the absolute temperatures, we cannot determine the specific amount of heat energy exhausted during the compression process.

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Answer:

2.16×10⁻⁶ N

Explanation:

Applying,

F = kqq'/r² (coulomb's Law)....................... Equation 1

Where F = electrostatic force, k = coulomb's constant, q = charge on the styrofoam, q' = charge on the grain of salt, r = distance between the charges.

From the question,

Given: q = 0.002 mC = 2.0×10⁻⁶ C, q' = 0.03 nC = 3.0×10⁻¹¹ C, r = 0.5 m

Constant: k = 8.99×10⁹ Nm²/C²

Substitute these values into equation 1

F = (2.0×10⁻⁶)(3.0×10⁻¹¹)(8.99×10⁹)/0.5²

F = 2.16×10⁻⁶ N

Multiple shadow regions can be observed in the wall behind the keyhole of a door. Option B is correct.

It is a phenomenon that happens when a wave (Light) is passed through a narrow aperture or a sharp edge, the light bends at the edges.

The light bends at the edges because the sharp edges have less diameter than the wavelength of light.

Therefore, multiple shadow regions can be observed in the wall behind the keyhole of a door.

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Answer: B) It spreads out into multiple shadow regions.

Explanation:

I got it right on edge

Answer:

t = 5.05 s

Explanation:

This is a kinetic problem.

a) to solve it we must fix a reference system, let's use a fixed system on the floor where the height is 0 m

b) in this system the equations of motion are

              y = v₀ t + ½ g t²

where v₀ is the initial velocity that is v₀ = 0 and g is the acceleration of gravity that always points towards the center of the Earth

e)    y = 0 + ½ g t²

     t = √ (2y / g)

     t = √(2 125 / 9.8)

     t = 5.05 s

Given,

The force applied by each person who is pushing the object, F=50 N

The frictional force, f=20 N

The frictional force is the force that opposes the motion of the object. As the people are pushing the object to the right, the frictional force will be directed to the left. And as the force with which people are pushing is greater than the frictional force, the net force will also be directed towards the right.

The net force is given by,

On substituting the known values,

Therefore the net force on the object is 80 N to the right.

Thus the correct answer is option 4.

Answer:

20.4 \(m/s^{2}\)

Explanation:

To start doing this problem, first draw a free body diagram of the table. My teacher always tells us to do this, and I find that it is very helpful. I have attached a free body diagram to this answer- take a look at it.

First, let us see if Net force = MA. To do that, we need to determine whether the object is at equilibrium horizontally. For an object to be at equilibrium, it either needs to be moving at a constant velocity or not moving at all. Also, if an object is at equilibrium, there will not be any acceleration. But we know that there IS acceleration horizontally, so it cannot be in equilibrium. If it is not in equilibrium, we can use the formula ∑F= ma.

Let us determine the net force. Since the object is moving horizontally, we can ignore the weight and normal force, because they are vertical forces. The only horizontal forces we need to worry about are the applied force and force of friction.

Applied force = 1055 N (490 + 565)

Friction force= Unknown

To find the friction force, use the kinetic friction formula, Friction = μkN

μk is the coefficient, which the problem includes- it is 0.613.

N is the normal force, which we have to find.

*To find the normal force, we have to determine if the object is at equilibrium VERTICALLY. Since it has no acceleration vertically (it's not moving up/down), it is at equilibrium. Now, when an object is at equilibrium in one direction, it means that all the forces in that direction are equal. What are our vertical forces? Weight (mg) and Normal force (N). So it means that the Normal force is equal to the Weight.

Weight = mg = (40)(9.8) = 392 N

Normal force = 392 N

Now, plug it back into the formula (μkN): (0.613)(392) = 240.296 N

Friction = 240.296 N

Now that we know the friction, we can find the horizontal net force. Just subtract the friction force, 240.296 from the applied force, 1055 N

Horizontal Net Force: 814.704 N

Now that we know the net force, plug in the numbers for the formula

∑F= ma.

814.704 = (40.0)(a)

*Divide on both sides)

a = 20.3676 m/s^2

Round it to 3 significant figures, to get:

20.4 \(m/s^{2}\)

The average velocity during the time period [1, 2] is 8 cm/s, calculated by dividing the displacement of the particle by the time interval.

To find the average velocity during the time period [1, 2], we need to calculate the displacement of the particle at t = 1 and t = 2, and then divide it by the time interval.

The displacement of the particle at t = 1 is:

s(1) = 2sin(π * 1) + 4cos(π * 1) = 2(0) + 4(-1) = -4 cm

The displacement of the particle at t = 2 is:

s(2) = 2sin(π * 2) + 4cos(π * 2) = 2(0) + 4(1) = 4 cm

The time interval is Δt = 2 - 1 = 1 second.

The average velocity during the time period [1, 2] is given by:

\(\begin{equation}v_avg = \frac{s(2) - s(1)}{\Delta t} = \frac{4 - (-4)}{1} = 8 \text{ cm/s}\)

Therefore, the average velocity during the time period [1, 2] is 8 cm/s.

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From the calculation that we have done, the mass of the isotope that is left is 0.25 mg.

The half-life of an isotope is the time it takes for half of the radioactive atoms in a sample to decay. Radioactive decay is a process in which an unstable atomic nucleus loses energy by emitting radiation, such as alpha particles, beta particles, or gamma rays, and transforms into a more stable nucleus.

Using the formula;

N/No = (1/2)^t/t1/2

N = amount at time t

No = initial amount

t = time taken

t1/2 = half life

Then we have that;

N/64 = (1/2)^18/6

N/64 = (1/2)^3

N = (1/2)^3 * 64

N = 0.25 mg

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The momentum for the microwave photons emitted by the digital wireless telephone is 4.27E-33.

Energy for the microwave photons emitted by the telephone is 1.28E-24.

Without the aid of wires, cables, or any other kind of electrical conductors, wireless communication entails the transmission of information across a large distance.

Using a wireless signal to link and communicate with two or more devices using wireless communication methods and equipment falls under the broad category of wireless communication.

The transmitted distance can range from a few meters (for instance, the remote control of television) to thousands of kilometers (for example, radio communication).

Cellular telephony, wireless internet access, wireless home networking, and other uses for wireless communication are all possible. Faster and more rapid data transmission is achieved. reduced installation and maintenance costs in comparison to other networks.

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Answer:

D. Fats

Explanation:

they are the long term energy storing nutrient carbohydrates are a quick way for energy minerals dont contain any energy and neither do proteins

fats

Explanation:

it is nutrient kept in the body

Answer:

100 J work was done.

Hope you could get an idea from here.

Doubt clarification - use comment section.

Answer:

Using

1/2mv^2 = work done by friction

work done = force x distance

lets call the force 3 N

lets call v = 3 m/s

lets call mass = 2 kg

0.5 x 2 x 3^2 = 9 J

9/3N = 3 m/s

now times 3 m/s by square root of 2 of which is 1.4142

3 x 1.4142= 4.2426 m/s

0.5 x 2 x 4.2426^2 = 18

18/2N = 9 m